Connection with plug switches



A ril 20 1926. 1,581,573

Y -s. M. HALE CONNECTION WITH PLUG SWITCHES Filed March 21 1925 Patented Apr. 230, 1926.

SIDNEY MOSES HALE, OF BUABDEAN, ENGLAND.

CONNECTION WITH PLUG SWITCHES.

Application filed March 21, 1925.

To all whom it may concern:

Be it known that I, SIDNEY .h'lOSEB IlALE, a subject of the King of England, and resident of Ruardean. in the county of Gloucestershire, in the Kingdom of England, have invented certain new and useful Improvements in Connections with Plug, Switches, of which the following is a, specification.

ll he invention relates to plug switches and is more particularly intended for use with wireless apps 'atus, its object being to enable a telephone to be plugged into the phone circuit from the wireless receiving set wherever the fitting is provided.

It will hereinafter be seen that with this invention 1 have an automatic plug-in and cut-out telephone hook adapted to always be in series in the telephone circuit of a wireless receiving apparatus.

The invention. is shown in the acocmpanyinn drawings, in which:

Figure 1 is a front view with the cover removed; Fig. 2 is a side elevation with the cover removed but showing how the telephone receiver is used; Fig. 3 shows a corresponding view to 2 with the cover in position; and Fig. 4 is a plan of Fig. 1; Fig. 5 shows a detail.

According; to the invention leads 1 from the phone terminals of the wireless receiving apparatus are taken to various points or rooms and connected with plug switches.

- lhe switch consists of a base 2 of insulated material appropriately recessed at 3 to receive the shank of ahook member 4 which passes downwardly through a thickened portion 2* of said base member 1 and projects beyond the cover 5 of the device for the purpose of holding the telephone 6. Such hook t is spring controlled so as to automatically move upwards when the telephone is removed from the hook in a known manner. For example, the upper part of the shank ihas a flat thin plate 7 upon which is carried, at right angles to the hook, an insulated roller 8 bearing against a spring blade 9 and which it carries downwardly when the telephone 6 is hung on the hook 4.. The main leads 1 are secured to terminals 10 one on each side of the said shank l. One such terminal 10 is provided with or connected to one end of said spring blade 9, the other end of which contacts with Serial No. 17,4:07.

an abutment or stop 11 on or connected with the other terminal 10 when the tele phone 6 is hung on the hook l so closing the circuit.

The said tcrn'iinals 10 are further connected by metallic strips 19. fitted on the base piece to plugdn terminals Reach of which has a fitting tori'uinp; a contact 1% at one side and a spring clip 15 at the other side said spring clip 15 being adapted to press in a cut away portion 16 in the said plug-in members 13 which are advantageously formed by bending round the ends of the strip 12.

The spring-15 of one plug 13 contacts with the contact 1%: of the t ier plug 13 so that normally the circuit is also closed through these two plugs 13, whether the telephone is on the hook or not.

it will thus be seen that the circuit is always closed either by the spring 9 alone or by the springs 15 on the said plugs 13 unless the telephone leads 1'? are plugged into the two plugs 13 whereupon the springs 15 are forced away from the plugs 13, while the telephone 6 having been taken oil the hook 4, the spring 9 is out of contact with its stud 18 with the result that the telephone 6 is in circuit, as will be readily appreciated.

The device provides a simple and e'llicient means for using one pair of telephones or more, in any room where the same is fitted.

I claim:

1. An. automatic plug-in and cut-out telephone hook for series connection in wireless telephone circuits characterized by a base member, a pair of terminals mounted on said base, a telephone hook slidable in a recess in such base, means connected with such hook for depressing a blade spring when the receiver is applied to the hook, to close the circuit between the terminals, plugin terminals connected with the aforesaid terminals and plug-in leads on a receiver for engaging the plug-in terminals and a cover, as described.

2. An automatic plug-in and cut-outtelephone hook tor series connection in wireless telephone circuits characterized by a base member, a recessed sliding telephone hook in said base, terminals for the main circuit, a plate on said hook carrying a pin and an insulated roller, said roller being caused to depress a blade spring when the receiver is on the hook and closing the circuit between the two terminals, connecting strips between the main terminals, )lug-in terminals mount-V ed on a raised portion of said base, spring contacts connected to such plug-in terminals and adapted to be electrically disconnected SIDNEY MOSES HALE. 

